663409934798 has 64 divisors (see below), whose sum is σ = 1099259320320. Its totient is φ = 298423222272.

The previous prime is 663409934741. The next prime is 663409934801. The reversal of 663409934798 is 897439904366.

It is a happy number.

It is a super-2 number, since 2×663409934798² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61943468 + ... + 61954176.

It is an arithmetic number, because the mean of its divisors is an integer number (17175926880).

Almost surely, 2^663409934798 is an apocalyptic number.

663409934798 is a deficient number, since it is larger than the sum of its proper divisors (435849385522).

663409934798 is a wasteful number, since it uses less digits than its factorization.

663409934798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11181.

The product of its (nonzero) digits is 211631616, while the sum is 68.

The spelling of 663409934798 in words is "six hundred sixty-three billion, four hundred nine million, nine hundred thirty-four thousand, seven hundred ninety-eight".